page{background-color: #fff;}
$tabBarH: 90px;
$mainNavW: 160px;
.mainCategory{
    .mainNav,.mainContent{padding-bottom: $tabBarH;position: absolute;top: 0;bottom: 0;overflow: hidden;}
    .mainNav{width: $mainNavW;left: 0;background-color: #f5f5f5;}
    .mainContent{left: 180px;right: 0;}
    .mainList{position: absolute;top: $tabBarH;bottom: $tabBarH;left: 0;width: 100%;overflow: hidden;}
    .cart-bar{position: absolute;bottom: $tabBarH;right: 0;}
}